Apparatus for testing or measuring sizes or dimensions



G. F. PEMBROKE July .27, 1943.

APPARATUS FOR TESTING OR MEASURING SIZES OR DIMENSIONS Filed March 26, 1942 2 Sheets-Sheet l y 27, 1943- G. F. PEMBROKE" 2,325,423

APPARATUS FOR TESTING OR MEASURING SIZES OR DIMENSIONS Filed March 26, 1942 2 Sheets-Sheet 2 Patented July 1943 I I APPARATUS'FOR TEsTINGoa-Mniasmmd" r srznsgon DIMENSVTONS George Frederickl l embroke, Dept ford,f London-,

I England, assignor-to Molins Machine Company, j Limi d. Pa e Application Marches, 1942, SerialNo. 436,369;

ir n le dw In Grea'tRBritain March 18,--1941-- 1.

, r scam wi s-+17 5' I This invention concerns improvements-in or "relating to apparatus for-testing or' 'm'e'a'suring sizes or dimensions and has particular reference. to' apparatus fortesting the internal dimensions 'ofhollow articlesw According to theinvention there is provided apparatus for. testing-the internal dimensions being arrested by .a stop when the; feelers-have {been inserted into an article, and theiactuatingmeans. may include an operatingzlever movable aboutthe axis of rotation "of the carrier, the ':operating leverkbeing movable relatively. to the 1 carrier and arranged to move the carrier against ,the stop and thereafter to move the feelers away from each other.. v i q jjOn'e embodiment of theinven'tionwill now be described, by way of example, with reference to the accompanying drawings which show part of a machine for testing the internal dimensions :of articles and in the ensuing description the articles to be tested comprise cartridge-cases,

"in-the drawings but a similar "guide is provided "to control-the'other end'of thelcase. Ata-position whichyis in frontof' 'the open end Of 8,.

case when the latter is in position on the V shaped-supports, abracket 4 is bolted tothe frame 39 of the machine.

mounted the testingdevicei The testing device comprises a carrier 5 which is mounted for hereinafter referred to, for convenience, as H cases.

In the drawings: Figure 1 is a sectional sideelevation of the apparatus.

. Figure 2 is a view of Figure l in the direction of the arrow A with part of the frame broken away. i V v Referring to the drawings, cases so are fed in succession on to V shaped supports 2*which are located at the position -at which. the internal .di-

mension of the case at'the open end thereof is to be tested. The mechanism for feeding the cases to the supports is preferably similar to that described in the co-pending United? States Patent application No. 434,127, and is indicated in Figure 2 where a rotary transfer member T is shown. r g

As the cases are moved towards and on to the V shaped supports, the bases of the cases are engaged by vertical guides 3, these guides being arrangedto ensure that the case is in the correct position when it is resting on'the V shaped supports. Only onesuch guide .is shown "bracket. 1

from one arm 1 ofwthe fork there extends, across thel-forlga second spindle 8 theaxis of which other armof the fork. On .two bellcranklevers 9 and as.' t01be freely movable- One arm of each of *each other. --above theother and comprise feelers. 'ers: are urged towards each other by springs il'zuand l3- which are Ianchoredto the screws movement about a spindle 6 supportedby the The carrier is a forked member and is parallel to' the axis" of 'the spindle about "which the-carrier 'is movable. The arm from is longer than the which the spindle extends this second spindle, l0 are'mounted so the. bellecrank levers has a-fshaped headll which is'ofsegmental form and these arms of the bell-crank levers are {so arranged that the straight surfaces of the-segmental portions face .The segments are arranged' one The feel- 25,; Figurerz. 1 Whenxthe feelersare pressed towards each other, by said springs, the distance between the opposite curved surfaces thereof is less thanthe they are to be, inserted.

The other arms of the bell-crank levers each have projections I4 extendingfrom the flat faces thereof and these projections provide stops which preventthe bell-crank levers from being moved past each other. These other arms of the bellcrank levers provide a V shaped space into which extends an actuating-pin l5, the purpose of which will be described below.

Between the forked arms of the carrier and freely mounted on the spindle supporting the carrier, there is provided an actuating-member which comprises a bell-crank lever l6.

One arm of this bell-crank supports the actuating-pin I5, referredto above. The other arm of the bellcrank lever; is pivotally connected at H to a link l8. The other end of the link is pivoted at H! to a sliding bar 53. The movements of the bar operate indicator-mechanism which may be similar to that referred to in the specification accompanying co-pending United States patentapplication No. 399,561 in the name of Felix F. V

Ruau. The longer arm of the forked carrier also supports a pin 20 which extends beneath that :On" this bracket is diameter of the case into which follows.

. li'mits. I

At theendqor" some1cartridgeecaseszthere.,is;a v I depression in whichzis. locatedzan anvil. When the actuating-pin I5 is fixed.

On the machine frame 39 there is secured a stop screw 2 I, Figure 1, against which the longer arm of the carrier is arrested when the feelers are inserted into the open end of a case., A torsion v spring 22 tendsgto rotate the carrier on the spindle 6 and-move it towards the stop 2 I.

The operation of the testing apparatus is as When a testing operation is about to' commence, the carrier is held away from the stop against the action of the torsion spring} by'; means of the link connecting it with the bar 53. After a case has been properly positioned in the V shaped supports, the linltrotates theactuatingv bell-crank lever and permits the springi-Zto r0 tate the carrier and feelers, ;until the carrier is arrested by the stop 2|. When the=carnierlis S0 arm of the actuating bell-crank lever to which and operable thereon to move the support to :locate the -feele'rs'within the article and there- 1] after 't'o"displace'said feelers with respect to said suppor.t -into calipering engagement with the i 1 :article.

arrested, the feelers have been insertedintothe open end of the case. Continued movement of zthe link causes the actuating r bell-crank i lever rto rcontinuexits movementuntil theractuatineminA-B has forcedthe feelers, apart from-each other; so rthat -;the. arcuate .surfaceswof, .the feelersa'engage ,opposite inner sm-faces: of the case; .The: extent eotgmovement of 1 the vmar --53, and thus fits .final 1 position, is thereforedetermined;bythe-distance which the feelers ware moved-apart when .they are moved .into engagement with :the eODDQSl-Zd ;inner surfacesrofthe case. i-Thus, according to the distancewhich: the; link; is moved,- the. magnet .on-the slidable willwset one 1,01 other :of ;the indicator members should the internal ,fdiameter of the. case. be-foundrnottoibe within the desired it is desired to .gauge -thc-;interna1 :hiametrical dimensions or" this depressionumechanism similar ,to thataboveidescribedmmaynbe employed.

, What I claims-as=;n1y:inventiontand-desirepto secure,byLetters-Patentdst A 1. II napparatus ton-testing thesinterna'lrdimen- .sionsof hollow :artic1es,-;theicombination with.;.=a support, of feelers-mountedzomsaidtsupportz for movement toward-:andaway fromseach other to .caliper the article andemeans;connected'ito said 3. In apparatus for testing the internal dimensions'ofhollow articles, the combination with a support; of feelers: mounted on. said support.) for movement toward: and away :from each rotherwto gcaliper the article,- means:mounting said-support zfonmovemen't to:and;fro m apositioninwhich the feelers extend within the articlegmeansvlimiting :the' movement :of said::support toward ,-such:.posi

tion, means connected .to said. support andgoperable thereon to move the support-.to-locate the feelers withinxthe' article and: thereafter :to displacesaidfeelers with respectito saidsupport into ,calip,ering engagement witht-he artic1e,;said last gnamed means acting againstrsaid yfeelers :to ef- --fe,ct :displacement of said .support, iandvspring -means urging-saidfeelersrtoward each other and away from engagement ,withithearticle.

. akin apparatus for testingtheinternal dimenqsionsv of rhollow articles, :the combination :with :a' zpivoted support, "of .ieelers pivotally mounted. on said :support for movement toward and .away ifromteach other: to; caliperthezarticle, and; means ccnnectedto. saidgsupport and operablezthrough asaid :feelersztczmove; said support .to .positionsaid feeiers within the :article :andithereafter to. dis- -gplace said feelers (with respectx'to .said support into calipering engagement withathe article IGEORGE FREDERICK PEMBROKE. 

